Salt Yard Plains is a Prototype 2 area included in the Green Zone.
It can be reached by using an airbirdge to travel from the Yellow Zone.
In Salt Yard Plains, you can find only four Blackboxes.
There are no Lairs and no Field Ops in this area; however, the Blackboxes are well hidden.
If you manage to find all Prototype 2 Salt Yard Plains collectables, you can unlock a new offensive mutation for Heller.
Salt Yard Plains should be the first area you explore when you enter the Green Zone, because the offensive mutation you can unlock by finding all Black Boxes will help you further in the game, since the next two areas, Lincoln Meadows and Fulton, feature two hidden Lairs, each.
The coordinates for all Prototype 2 Salt Yard Plains Blackboxes that can help you find them faster, are revealed below.
Salt Yard Plains Blackboxes Coordinates
Blackbox #6: 690, 1572
Blackbox #7: 695, 1595
Blackbox #8: 750, 1541
Blackbox #9: 672, 1639
